61873619 has 2 divisors, whose sum is σ = 61873620. Its totient is φ = 61873618.

The previous prime is 61873597. The next prime is 61873627. The reversal of 61873619 is 91637816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61873619 - 2¹² = 61869523 is a prime.

It is a super-2 number, since 2×61873619² = 7656689456314322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61873639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30936809 + 30936810.

It is an arithmetic number, because the mean of its divisors is an integer number (30936810).

Almost surely, 2^61873619 is an apocalyptic number.

61873619 is a deficient number, since it is larger than the sum of its proper divisors (1).

61873619 is an equidigital number, since it uses as much as digits as its factorization.

61873619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 61873619 is about 7865.9785786639. The cubic root of 61873619 is about 395.5200520668.

The spelling of 61873619 in words is "sixty-one million, eight hundred seventy-three thousand, six hundred nineteen".